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A090353 as a simple table

n a(n)
0 1
1 1
2 4
3 28
4 286
5 3886
6 66260
7 1361972
8 32784353
9 904412593
10 28124223808
11 973106096392
12 37073604836768
13 1541948625066176
14 69513081435903392
15 3376138396206853792
16 175739519606046355540
17 9760024269508314079444

[1,1,4,28,286,3886,66260,1361972,32784353,
 904412593,28124223808,973106096392,37073604836768,
 1541948625066176,69513081435903392,
 3376138396206853792,175739519606046355540,
 9760024269508314079444]

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Last modified August 12 13:41 EDT 2024. Contains 375113 sequences. (Running on oeis4.)